pH is the most problematic variable in cannabis cultivation and the one most often ignored. A grower can have the right substrate, the right nutrients, the perfect lighting and still see their plants with yellow leaves, burnt edges and stunted growth. In most of these cases, the diagnosis [...]

Pests give no warning. One day the plants are perfect and three days later the underside of the leaves are covered with white spots, new leaves appear deformed or the substrate starts to smell musty. The time it takes you to identify the problem is the time the pest has to multiply. This [...]

You have been taking care of your plants for months. You've controlled the pH, you've fed in phases, you've trained the branches. And now you're in front of the buds and you're asking yourself the only question that matters: when do I cut? Harvesting too early is the most expensive mistake in growing. You lose potency, you lose weight, and you lose the full development of the buds.

Cannabis nutrition has a reputation for being complicated. There are those who keep a notebook with daily measurements, those who follow nutrient tables with milligram doses, and those who buy supplements for every micronutrient imaginable. And then there's the reality: most nutritional problems come not from giving too little, but from giving too much, in the same way as [...]

Having a terrace or balcony is, for many urban growers, the only option for access to real sunshine. And the real sun - especially in Spain - is still the most powerful, free and spectrally complete source of light there is. If well used, a south-facing balcony can produce buds of a quality that will surprise anyone who [...]

We have been hearing the same question for years in every forum, every community, every grow shop: what light should I buy? Lighting is the most expensive and most important decision in indoor growing. Get it right here and you will pay in electricity, production and quality all season long. In this guide, let's cut to the chase: [...]

Editorial note: This guide is updated every season. Each section links to more detailed articles - use it as a navigation map to all the knowledge on the 00 Seeds blog. Table of contents Growing cannabis from seed is one of the most satisfying experiences there is for a plant enthusiast. It can also be [...]

You've been looking through the catalogue for weeks. It's clear to you what you want to grow, but the question blocks you from the start: automatic, feminised or Fast Version? It's not a trivial decision. Choosing the wrong format can cost you an entire harvest, weeks of work or an annoyance with the neighbour who looks at you funny. At 00 Seeds, we've been making this choice for more than a decade [...]